MacBook Air - Running Your MacBook Air on Battery Power

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Running Your MacBook Air on Battery Power

When the MagSafe power adapter isn’t connected, your MacBook Air draws power
from its built-in battery. The length of time that you can run your MacBook Air varies,
depending on the applications you use and the external devices connected to your
MacBook Air.

Turning off features such as Wi-Fi or Bluetooth® wireless technology and reducing
screen brightness can help conserve battery charge . Many of your system preferences
are automatically set to optimize battery life.

Charging the Battery

You can determine whether the battery needs to be charged by looking at the
indicator light on the MagSafe connector. If the light is glowing amber, the battery
needs to be charged. If the light is glowing green, the battery is fully charged.

You can also check the amount of battery charge left by viewing the Battery status
icon (

) in the menu bar. The battery charge level displayed is based on the amount

of power left in the battery with the applications, peripheral devices, and system
settings you are currently using. To conserve battery power, close applications and
disconnect peripheral devices not in use, and adjust your Energy Saver settings.
For more information about battery conservation and performance tips, go to

When the power adapter that came with your MacBook Air is connected, the battery
recharges whether the computer is on, off, or in sleep. The battery recharges more
quickly, however, when the computer is off or in sleep.

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Chapter 2

Life with Your MacBook Air

The battery in your MacBook Air can be replaced only by an Apple Authorized Service
Provider or at an Apple Retail Store.